If you can you have a component in the service menu called Email, if you want this one to work you have to configurate the CustomWorkItemHandlers.conf (jbpm-console.war\WEB-INF\classes\META-INF) and add this line:

"Email": new org.jbpm.process.workitem.email.EmailWorkItemHandler("host","port","josetf@domain.com.co","pass")